Mole Concept Flashcards
(16 cards)
Mole (mol)
The amount of substance which contains the same number of particle as the number of atoms in exactly 12g of carbon 12
Mole Mathematically
mole = mass(g) / molar mass
Molar Mass
The mass in grams of one mole of an elemt or compound
What is Standard Temperature and Pressure
Temp: 0°C (273.15 K)
Pressure: 1 atm or 101.325 kPa
What volume does one mole of all gasses occupy at S.T.P
22.4L or dm³
1 liter = 1,000 milliliters (mL) or 1,000 cubic centimeters (cm³)
Avogadro’s Number (constant)
The number of particles that are in one mole of a substance
6.022 × 10²³ particles per mole.
Avogadro’s Number Mathematically
Avogadro’s Number = Number of Molecules, ions, atoms / mole
Mole Fraction
Obtained by dividing the mole of component in question by the total mole of all components in a solution
Mole Fraction Mathematically
Xa = (mol a) / (mol b +mol c +mol a)
Molecular Formula
The true formula representing the total numbers of atom of each element present in one molecule of a compound
Know how to findk
Empirical Formula
The simplest formula, gives the smallest whole-number ratio of atoms present in a compound
Know how to find emperical formula
Molecular Formula Mathematically
n * Emperical Formula
n = Molecular Formula mass
Emperical Formula mass
Stoichiometry
The study of qualitative and quantitative relationships between substances undergoing chemical change
How to find Percentage Yield
Actual Yield / Theoretical Yield
What is Dilution?
Adding more solvent to a solution to decrease the concentration
What is Titration?
When a known volume of reactant is added with a known volume of another reactant till the endpoint
